Yarn feeding mechanism for twisting and doubling machines



Oct. 19, 1937. c. c. SORENSEN 2,096,654

YARN FEEDING MECHANISM FOR TWISTING AND DOUBLINCT MACHINES Filed Aug.26, 1956 2 Sheets-Sheet l l A l I zlv wa/rvtom: CARL CSORENSEN PatentedOct. 19, 1937 YARN FEEDING MECHANISM FOR TWIST- ING AND DOUBLINGMACHINES Carl C. Sorensen, Charlotte, N. 0. Application August 26, 1936,Serial No. 97,984

4 Claims.

This invention relates to yarn feeding means for twisting and doublingmachines in which an individual unit is associated with each spindle andwhereby two strands can be fed to each 5 spindle at different rates oftravel whereby the desired effect can be produced in the yarn.

It is therefore an object of the invention to produce mechanismassociated with a, twisting and doubling machine in which two yarns,either single or combined, are fed to a spindle at different rates andwhereby a yarn of less tensile strength such as fine count cotton can betwisted or doubled with a stronger yarn such as rayon, or acetate orcombination thereof and thereby eliminate many of the parting of theends which heretofore have occurred in such circumstances. Thismechanism also lessens the stretch in the yarn which is fed at thefaster rate; it increases the breaking strength of combination yarns,espe cially acetate and crepe combinations irrespective of the number ofends used. By using a fast feed roll and a slow feed roll to wrap oneyarn around another a knitting yarn can be produced in which one strandwill have more slippage over the other so as to obtain different effectsin the fabric, such as cotton and acetate yarns and also combinations ofrayon, acetate and silk yarns.

It is still another object of the invention to provide a pair of feedrolls for a doubling and twisting machine driven at different rates ofspeed. This result is obtained by using the conventional feed rollswhich are now driven at the same rate of speed and around which a yarnis wound, by providing means wherebythe two feed rolls are driven atdifferent rates of speed to feed two difierent yarns to the spindle.

It is a, further object of the invention to replace the individual feedunits on present twisters with a pair of individual rollers for eachspindle which have means for driving the rollers at different speeds sothat two yarns can be fed at the same time to a spindle. In this caseone yarn is wrapped around one feed roll several times to preventslippage, while the other yarn is also wrapped around the other feedroll in a like manner.

The purpose of the invention is to allow a faster delivery of one yarnwhen two or more ends are being twisted together. For example, if an endof acetate and an end of rayon is to be twisted into one thread and acertain effect like having the acetate thrown to the front, the rayonwould be wrapped around the slow feed roll and the acetate around thefast feed roll.

The speed with which the one yarn is to be thrown faster into the twoply can be controlled by interchanging the fast feed roll gear. Namely,if the yarn is to "be fed real fast a small number of tooth gear wouldhave to be inserted and if to be fed only slightly faster a larger toothgear would be inserted.

With this attachment if a yarn is rather difficult 'to run withouttaking out too much stretch it can be placed over the fast feed roll.Running in this manner it also avoids breaking so many filaments onrayon or acetate particularly and makes a cleaner thread.

In many combinations, such as alpacas and types of twistsuch as this inwhich rayon crepe and regular acetate is twisted together and sometimesthis again plyed, it is necessary to get the best effect to feed oneyarn in faster. centage of increase depends on the deniers and thenumber of' turns needed for the effect in the fabric needed. With thisattachment one yarn can be fed 5% faster and up to the required amountto give the best balanced and weaving or processing yarn.

-This same fast feeding of one yarn can also be made-forhosiery yarnsusing various types of rayon, cotton, silk or mixed yarns, as beforeenumerated. In other words if one yarn is'desired to'be wrapped aroundthe other or others so that more of the exterior yarn will show on theface of the fabric, the yarn desired to show would be wrapped around thefast feed roll. The amount will be determined by the effect desired; Forexample, if a fabric for hosiery was needed in which the silk showed onthe face more pronounced than the present method of twisting, the silkwould be fed in faster and at the rate determinedby efiect wanted. Asbefore stated, this would be accomplished by changing the fast-feed roll,gear.

Some-of the objects of the invention having been stated, other objectswill appear as the-description proceeds when taken in connection withthea'c'companying drawings, in which:

Figure 1 isan elevation of one end of a doubling and twisting machineshowing my invention applied thereto;

Figure 2 is a vertical sectional view taken along the line 2-2 in Figure1;

Figure 3 is a vertical sectional view taken along line 33 in Figure 1;

FigureA isan enlarged detail sectional view tjaken along line 44 inFigure 1 showing the invention;

Figure 5 isa sectional view looking at the The peropposite side ofFigure 4, with the housing cover removed;

Figure 6 is a sectional plan view taken along line 6-% in Figure 4;

Figure 7 is an enlarged sectional plan View taken along line 5-1 inFigure 4;

Figure 8 is an enlarged view of a pair of strands twisted in accordancewith the invention.

Referring more specifically to the drawings, the numeral I9 denotes anend frame of a doubling and twisting machine which has secured to thebottom portion thereof longitudinally disposed struts and I2. Alongitudinally disposed strut I3 is also secured to the upper portion.These struts have their other end secured to another end frame notshown, similar .to end frame IE! to form a complete framework for ho1d-"ing the apparatus. Secured to endframe I is a bracket l i upon which ismounted a motor l5, said motor being connected by means'of a suitablecoupling Hi to shaft The shaft I! has a sprocket 8 fixedly securedthereon which sprocket drives a sprocket chain l9. Sprocket chain I9 isalso mounted on another sprocket 20 which, in turn, is fixedly securedupon shaft 2|.

The shaft I"! has a gear 25 keyed thereon which is adapted to constantlyrotate pinions.

26 and 27 which pinions are fixedly secured upon shafts 28 and 29respectively. The shafts 28 and 29 extend longitudinally of the machineand have located thereon at spaced intervals suitable gears 30, whichgears mesh with gears 3| mounted on spindle shafts 32. A spool 33 isplaced upon the upper portion of spindle shaft i 32 for receiving theyarn after it has been twisted.

A suitablering rail 34 encircles the spool 33 and is adapted to beoscillated up and down to traverse the length of the spool to cause theyarn which has been twisted to be wrapped therearound. The yarn which iswrapped around the spool 33 is twisted immediately before being wrappedthereon and the twisted strand will be designated by the referencecharacter 35. This strand comprises a pair of strands such as 31 and 38said strandsbeing drawn downwardly from spools or cones 39 and 4|!respectively, through a suitable tension device 4| and thence downwardlythrough the feeding device 42 which is the present invention. g

The parts designated by the reference characters ill to 4| inclusive areconventional but it is deemed necessaryrto show this much of the oldstructure to more clearly disclose the present invention.

The feeding device 42 is fixedly secured to vertically disposed shaft45, which shaft has its upper end slidably mounted-inbracket 46. Thelower end of, shaft 45 is pinned to a horizontally disposed link 59which link has its other end pinned to the upper end of verticallydisposed shaft This shaft 5| extends downwardly and has its lower endslidably mounted in longitudinally disposed strut H or l2 and its upperend is slidably mounted in housings 52, which housings normally containan'oil or a suitable lubricant for the gears therein. The rod 5| hassecured to the lowermost end a footjpedal or projection 53 which isadapted to be engaged by the operators foot when it'is desired to throwthe feeding apparatus ingear. A compression spring 5-5 is confinedaroundthe rod 52 by means of a collar 55 and also by means of struts H or |2to normally force the parts into a disengaged position; however, afterit has been once. placed into an engaged position, by. exerting pressureupon foot pedal 53, the parts will remain in engaged position untilcertain mechanisms are operated to throw the parts out of gear. Theseparts are conventional, and a description of the same is therefore notdeemed necessary.

The shaft 2| also has fixedly secured thereon a pinion 60, which pinionmeshes with an idler pinion 6|. The pinion 6| also meshes with anotherpinion 62 which is fixedly secured on one end of a short shaft 63, saidshaft 63 being mounted in bracket 64. The'other end of shaft 63 hassecured thereon a gear 65 which meshes with pinion 66 mounted uponlongitudinally disposed shaft 51. (Figs. 1, 2 and 3.)

By means of idler gears 68 and 69 another pinion is driven by pinion 66and this pinion 10 is fixedly secured upon longitudinally disposed shaftII which is similar in all respects to shaft 61 and performs the samefunction.

which are constantly rotated and are adapted to mesh with gears 16 ofthe feeding attachment 42. The gear 16 is pinned on one end of a shaft11 which shaft is rotatably mounted in a suitable bushing 18. Thisbushing is secured in hub portion 19 of housing 89'. Secured to theother end of shaft 11 by any suitable means such as a pressed fit is afeed roller 82 around which strand 31 is wound. The, strand 3'! is alsowound around apin 83 which extends outwardly in parallel relation to theshaft 11. By wrapping strand 3'! around both of the members 82 and 83the proper amount of tension is produced in the strand and it enablesone to vary the speed at which the strand is fed.

Loosely mounted around the hub of pinion I6 is a'plate 86, which platehas rotatably mounted therein as at 81 an idler pinion 88. This idlerpinion is adapted to also mesh with another pinion 89 which is securedon shaft 9|]. The pinion 89 isremovably secured to the shaft 99 since ithas va slot 9| in the hub thereof which is penetrated by a suitablepin92, said pin also being fixedly secured in shaft 90. washer 94 and ascrew 95 normally hold thepinion 89 on the shaft 99 in such a mannerthat the pin 92 will penetrate theslot 9| in the hub of pinion' 89.Shaft 90 is rotatably mounted in a suitable bushing 9! which bushing isalso secured in hub portion 98 of housing 80. Fixedly secured on ,theother end of shaft 99 by any suitable means such as a pressed fit isanother feed roller 99 aroundwhich the strand 38 is wound. The. strand38 is also wound around a suitable pin separator I99 which extendsoutwardly in parallel relation to the shaft 99. The number of turns:which are made around the'roll 99 and'separator I00 will determine theamount also play in important part in the speed of the strand 38 as.itis being fed downwardly from the spool 40 to be twisted with strand 31.v

In Figures 4 and 5, it will be noted that, pinion 89 is smaller thanpinion T6,;hence the pinion .89 will be driven at a higher rate of speedthan the pinion 16. Likewise, the roller 99 will be driven at a higherrate of rotation than the roller 92; consequently, the strand 38 will befed downwardly faster than the strand 3!. The strand 38 is usuallymadeof some suitablematerial such as acetate, cotton, rayon, silk oranyccombination thereof and is fed so fastrelative to strand 3! that thestrand. 38 is not stretched as much as strand :31, thereby throwing thegreater tension (Fig. 7) A.

upon the strand 31. The strand 3! usually has greater strength thanstrand 38; consequently, strand 3'! is fed around the slow feed roll 82,whereas, the strand 38 usually has less strength hence, it is fed fromaround the fast feed roll 99 so that the strand 38 will be virtuallywrapped around strand 31. By providing a construction of this type it ispossible to have a combination strand, which, when the tension isapplied to the finished strand, the elastic strand 38 will breakapproximately at the same time that the less elastic strand 3'! willbreak, hence a maximum tensile strength from the combined strands oftwisted yarn is obtained. Heretofore, these strands have been fedthrough and doubled at the same speed on silk twisters or doublers;consequently, due to the elastic limit of both of the strands 31 and 38being different, one of the strands would be broken before the maximumstrength of the other strand has been reached, therefore, the maximumtensile strength of the combined strand would not be obtained.

In order to vary the speed of the feed roll 99 the pinion 89 has beenmade removable as heretofore stated. If it is desired to increase thespeed of shaft 90 and the feed roll 99, the pinion 89 will be removedand a smaller pinion will be placed thereon. Since the idler pinion 88is rotatably secured to plate 85, this pinion can be radially adjustedabout the shaft 11 so that it will mesh with both pinions l6 and 89regardless of what size pinion 89 might be. When it has been adjusted tothe proper position, a set screw I02 is screwed home into housing St tofixedly hold the plate 86 in its proper position. This set screwnormally penetrates a radially disposed slot I03 cut in this plate. Acover HM is secured to the housing by any suitable means such as screw Ito normally close one side of the housing.

In the drawings and specification there has been set forth a preferredembodiment of the invention, and although specific terms are employed,they are used in a generic and descriptive sense only, and not forpurposes of limitation, the scope of the invention being set forth inthe appended claims.

I claim:

1. In a twisting machine having a plurality of spindles, a feeding unitfor each spindle comprising a pair of feed rolls, common means fordriving all of the rolls of said units, one of said rolls having ageared connection with said common driving means, a geared connectionbetween one.

roller and the other roller, said geared connection having aninterchangeable gear therein so that the rate of rotation of one rollcan be varied with relation to the other roll.

2. In a twisting machine having a plurality of spindles, a pair of feedrolls for each spindle around each of which a strand of yarn may bewound to feed the strands to the spindle, means for driving the rolls atdifferent rates of speed to feed the yarn on one roller to the spindleat a faster rate than the yarn on the other roller is fed to thespindle, and means for changing the relative rate of rotation of the tworolls. 7

3. In a twisting machine having a plurality of spindles onto which thetwisted strand is Wound,

an individual feed unit for each spindle, each individual unitcomprising'a plurality of feed rolls and each roll being adapted to havewound there- 'around a strand for feeding the same to the spindle, andmeans for driving the feed rolls in a unit at different rates of speedto thereby feed

